Ferroelectric Domain Structure of Lanthanum‐Modified Lead Titanate Ceramics
- 8 March 1990
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 73 (3) , 615-620
- https://doi.org/10.1111/j.1151-2916.1990.tb06561.x
Abstract
The ferroelectric domain configurations in lanthanummodified lead titanate ceramics have been studied by transmission electron microscopy in conventional, analytical, and high‐resolution modes. Results indicate a preponderance of (101), twin‐related 90° domains of equilibrium width 50 to 100 nm. These values are consistent with those derived from consideration of elastic strain energy. Below a critical grain size of approximately 0.3 μm, single‐domain grains are found. A domain wall energy of 1 mJ/m2 was calculated based on this observation. Within such twins are occasionally found ordered domains, displaying little or no misorientation with respect to one another. In addition, (001), 180° domains were observed.Keywords
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